Your kitten may be lonely at first, but if you talk and touch her often she will turn to you for the 'litter' support she has had. As for your older cat, you could be surprised at the bond that may develope. I have three cats in the house and the oldest cat was not the most welcoming when the second one arived.
My second cat was a female and she got outside on me before I could get her spayed so she had kittens and we kept one of these. (I have since had her and her kitten spayed so there cannot be any more accidents.) My older cat has taken to being a doting 'autie' to the kitten and they all play together. In fact it has been good for my older cat since she got fat after her spaying and she needs the exercise. Lol
Enjoy your new kitten and good luck.